Locating a bad chip on a PCB using hot and cold air

This Amiga CD32 had a bad audio DAC (LC78835M) which caused a lot of noise in the audio outputs.
In this video, I demonstrate the troubleshooting technique that I used to find out that this chip is faulty and needs to be replaced.
This Amiga CD32 has now been repaired and is working fine once again.

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